Moss CO3.6 these images were taken in cross polarized transmitted light at a magnification of 400X. For these images I am using an aus Jena Fluoval (Cancer research fluorescent microscope) modified somewhat!

The thin section was a loan from Jeff Hodges. I hope you Moss fans enjoy these. I worked on one thin section but the quality of images in the high magnification incident (reflected) light was not that good, it showed scratches so Jeff had an other thin section made that was polished to 1/4 micron on both sides with a final soft past polish to really bring out the shine. The results are beautiful. I guess I am part of only a few guys who even care what a thin section looks like at 1600X.

The last 6 images in the 1600X Neo category and the last 3 in the 600X Neo are of the first thin section. You can clearly see the scratches at that magnification.

Location: Moss, Østfold, Norway, ~59º26' N, ~10º42'
Type: Carbonaceous chondrite (CO3.6)
Date of Fall: July 14, 2006, ~10:20 hrs local daylight time (UT+2)

Description:
History and physical characteristics: (G. Raade and K. Ødegaard, UOslo; M. Bilet, NorAS) At about 10:20 am on July 14, 2006, a bright fireball traveling SSE-NNW was witnessed by many people and a loud explosion and a rumbling sound was heard in the air above Moss and Rygge in south Norway, on the east side of the Oslofjord. Shortly after, a small meteorite was heard to land on an aluminum sheet and was recovered.

Petrography: (J. Grossman, USGS; G. MacPherson, SI; L. Chizmadia, UHaw; A. Rubin, UCLA): Contains abundant small chondrules (most < 200 m), small (<1 mm) amoeboid olivine aggregates (AOAs) and refractory inclusions, and isolated grains of olivine, troilite, and kamacite set in a gray matrix. Chondrule types are dominated by type-I PO, with other varieties of type I and II chondrules plus RP, C, and BO all present. All type I chondrules show diffusional entry of FeO around edges and along cracks of forsterite grains. Olivine histogram is flat, resembling that of Ornans (range Fa0.3–42, average Fa19.9, =65%, n=60); Cr2O3 content of fayalitic olivine is low (0.09±0.09 wt%). Image analysis gives 2.2 vol% metal and 2.4 vol% FeS. Refractory inclusions contain spinel, calcic pyroxene, and abundant nepheline that replaces melilite and other primary phases; some perovskite has been transformed to ilmenite. Some AOAs contain relict cores of forsterite, but most of the olivine has been converted to more fayalitic compositions; degree of oxidation of AOAs is similar to type 3.6 CO chondrites such as . Matrix is mildly recrystallized and sulfur-poor; matrix olivine has similar composition to olivine in fine-grained chondrules and inclusions. Geochemistry: Magnetic susceptibility (R. Bartoschewitz), log (10-9 m3·kg-1) = 4.68. Oxygen isotopes (I. Franchi and R. Greenwood, OU), average of two replicates, 17O = 5.90ä, 18O = 2.21ä, 17O = 4.75ä. Classification: Carbonaceous chondrite (CO3.6, scheme of Chizmadia et al., 2002); shock stage S2. Specimens: Type specimens of 20 g (stone 4) and 2 g (stone 3) are on deposit at SI. Main masses are held by those listed above.
Mass: 3.76kg